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Pregled bibliografske jedinice broj: 804500

Časopis

Autori: Kalambura, Sanja; Krička, Tajana; Kiš, Darko; Guberac, Sunčica; Kozak, Dražan; Stoić, Antun
Naslov: High-risk bio waste processing by alkaline hydrolysis and isolation of amino acids
Izvornik: Tehnički vjesnik : znanstveno-stručni časopis tehničkih fakulteta Sveučilišta u Osijeku (1330-3651) 23 (2016), 6; 1771-1776
Vrsta rada: članak
Ključne riječi: alkaline hydrolysis parameters ; health risks ; slaughterhouse waste ; waste management
Sažetak:
Slaughterhouse waste can be very dangerous and potential risk for animal and human health. Brains and spinal cords are deemed high-risk substances and can be infected with prions ; their treatment is therefore only possible in strictly controlled conditions. One of the methods which can achieve the necessary reduction in health risk is alkaline hydrolysis. Standard alkaline hydrolysis is at 150°C, 3-6 hours, and 4 bars. In this investigations focus was on different alkaline conditions: temperature (135ºC, 150ºC, 153ºC), time (2, 3, 6 hours), and base (NaOH and KOH) due to fact that amino acids are sensitive to variations on temperature, pressure and base media. Analyzed amino acid composition of hydrolyzed material at different testing conditions show successful hydrolysis. Highest value of protein, which is generally relatively low, was achieved with NaOH at a temperature of 135ºC and time of 2 hours, whereas in the reaction with KOH the highest obtained value was achieved at 150ºC and 3 hours. A dry substance increasing with time, and the highest value was achieved at the temperature of 150ºC and time 6 hours for both bases (NaOH, and KOH). Most of the amino acids went full racemization during the process ; especially in D-amino acids like aspartic acid, glutamic acid, tryptophan and isoleucine. Lysine shows higher resistance to alkaline medium than other amino acids. Isolation of certain amino acids, like: asparagine, glutamic acid, glycine, alanine, and leucine, is possible because they show higher concentrations in hydrolysates.
Izvorni jezik: ENG
Rad je indeksiran u
bazama podataka:
Scopus
SCI-EXP, SSCI i/ili A&HCI
Science Citation Index Expanded (SCI-EXP) (sastavni dio Web of Science Core Collectiona)
Kategorija: Znanstveni
Znanstvena područja:
Biotehnologija
URL Internet adrese: http://hrcak.srce.hr/169366
Broj citata:
Altmetric:
DOI: 10.17559/TV-20150427225158
URL cjelovitog teksta: http://hrcak.srce.hr/169366
Google Scholar: High-risk bio waste processing by alkaline hydrolysis and isolation of amino acids
Upisao u CROSBI: Sanja Kalambura (sanja_kalambura@yahoo.com), 5. Ožu. 2016. u 18:37 sati



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